Cited 0 time in
Cited 0 time in
Quantum dots fromed in 3D Dirac semimetal Cd3As2 nanowires with magnetic barriers
- Quantum dots fromed in 3D Dirac semimetal Cd3As2 nanowires with magnetic barriers
- Jung, Minkyung; Yoshda, Kenji; Park, Kdong; Zhang, Xiao-Xiao; Yesilyurt, Can; Siu, Zhou Bin; Jalil, Mansoor; Park, Jin Wan; Park, Jeunghee; Nagaosa, Naoto; 서정필; Kazuhiko
- DGIST Authors
- Jung, Minkyung; 서정필
- Issue Date
- 34th International conference on the physics of semiconductors (ICPS 2018)
- Three-dimensional (3D) Dirac semimetals have attracted considerable attention owing to their exotic properties, both predicted in theory and recently demonstrated experimentally. Here, we demonstrate single quantum dots confined with two p-n junctions in 3D Dirac semimetal Cd3As2 nanowires under high magnetic fields. The device can be operated in two different regimes: (i) an n-typechannel between n-type leads underneath the source-drain contacts, creating an open regime (n-n-n configuration); (ii) a p-type channel in the middle of the nanowire, forming a p-type quantum dot (QD) (n-p-n configuration). At zero magnetic field, the quantum confinement effect vanishes in the n-p-n QD because the Dirac fermions penetrate p-n junctions with high transmission probability (Klein tunneling). However, the high magnetic fields bend the Dirac fermion trajectories at the p-n junction due to cyclotron motion, preventing the Klein tunneling. This results in a strong confinement at p-n junctions of Dirac materials. In this regime, the device shows clean Coulomb diamonds, indicating that a single QD is formed in a Dirac semimetal nanowire.
- University of Montpellier
- Related Researcher
Quantum Nanoelectronic Devices Lab
nanoelectronics, quantum transport, quantum physics, qubit, condensed matter physics,
There are no files associated with this item.
- Division of NanotechnologyQuantum Nanoelectronic Devices Lab2. Conference Papers
Division of Nanotechnology2. Conference Papers
Department of Physics and ChemistryNanospm Lab(Advanced Materials Research Group)2. Conference Papers
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.